Excavating bucket



Jan. 5, 1932. w. M. VENABLE EXGAVATING BUCKET Filed April 22, 1930 2Sheets-Sheet l l I I l I I 1 I INVENTOR Jan. 5, 1932. M. VENABLEEXGAVATING BUCKET Fi1ed ApI-i1 22, 1950 2 Sheets-Sheet :2

l I l l I I I IIL V Patented Jan. 5 I932 UN T D wILLrAirMAYovENAnrQE,biirrrrslauaen,rnNNsYLvANrA, assrenoa ro BLAW JERSEY Applicant?area; April 22',

This invention relates to eifcavating ets and is particularly applicableto that'type of bucket known as the leverarmlbucket which type twocables are; generally em ployed, one of which is theho'lding or llftlngcable and the other one the operating cable.

The invention is especially adapted for use in connection with lever armbuckets in which the closing line, after passing around a sheave in thelever arm and a sheave in the bucket head, returns again to the leverarm, either to be fastened thereto, or to pass around another sheave inthe lever arm and then re-' turn to the head. In buckets of this kindthere is an upper or head block containing sheaves and a lower or leverarm block also containing sheaves, and if both of these blocks arerigidly secured to their respective supporting structures, the leads ofthe line may be made perfect for one position of the lever arm only, as,for example, when the bucket is fully closed or when it is fully open,or in some intermediate position, and the amount 4 of the off-lead inother positions will depend upon various features of the design, such asthe length of the lever arm, the position of the sheaves in the head,and, as will appear more clearly hereinafter, upon the position of thehead pin.

With the foregoing in mind the principal object of my invention may besaid to reside in the provision of a bucket of the character describedin which the head pin is so located in relation to the head sheaves, thelever arm sheaves and the several hinges and pivots of the bucket as tomake more nearly perfect the leads of the line than has been possiblewith constructions previously in use.

It is also an object of my invention to'obtain a greater spread of thebucket when open in comparison with the bucket height, as well as toimprove the performance of the bucket by distributing to betteradvantagethe grappling effort caused by pulling on the closing lineduring a closing operation.

Incidentally, it is anobj ect of the invention to simplify theconstruction of the lever arm and also to somewhat raise the main hinge=Z pin so as to give the'scoops a greater reach magmas BUCKET 193g.seria1'm..44e,22a without increasing the head room requiredforfloperation; 1 p I I i A stiIl furtherobject of'the inventionre-isides in, the provision, of a construction by meansof which a greaterclosingforce is made possible by virtue of the fact that more line. ispulled during the closing operation than has been possible with leverarm buckc ts-heretofore in use; I v 5 The accompanying drawingsillustrate the invention in preferred form-15 ig. 1 being'asijdeelevation of the bucket in closed position Fig. 2 anend view ofFig. 1, and Fig. '3 a side elevation Oftlle bucket in its, wide OpeipositlOI L I I I Referring to the drawings it will be seenthatflI haveillustrated a bucket of the ordi-l nary 'four' hinged typein which thetwo scoop ine'mbers't and the two pairsof corner-bars 5 and 6 arepivotedtogether s'oas to form'a four hinged frame; 3 The scoops areprovided with the j customary hinge castings 7and"8pi o'ted together bythe main hinge pin 9, and at eacli'o'ut'er upper corner of each scoop 4is a corner bracket 10' to which the lower ends of the cornervbars 5 and6' are pivoted by means of'the corner pins 11.;

v Mounted upon the mainhingepin 9 is the lever arm' 12whi'ch is formedintegrally withthehu'bqportion 13' and the hinge casting 7, the hubportion being mounted as shownupon theiinain hinge pin 9. V i

*The bucket head 14 carries the head pi-n'15 which it'will benoted islocated tothe right of; the "erticalcent-er line of the bucket whichpasses throughthe main hingefpin 9'.

f The lever arm sheaves 16 turn uponthe pin' 7 17 which is parallel tothe'he'ad pin 15, the" main hinge pin 9 and thecorner pins '11, whichpins articulate the fra'mep The head sheaves-17 turn on the pin 18,which it will-- beseeIr-is not made parallel with any of the j otherpinslbut is so tilted with respectto them astomake the line leads fromthe head center line as in previous constructions, but on the sidethereof which is opposite to that of the lever arm sheaves. With thisarrangement, as the bucket opens, the lever arm descends substantiallyvertically until it reaches the position shown in Fig. 3, and during theoperation the head will tilt but very slightly owing to the greater orless spreading of the corner bars. In this way the leads of theoperating cable 19 will remain muchmore nearly perfect than if the leverarmis-skewedand the head sheaves are mounted on a head pin which islocated on the center line of the bucket or than if the head pin isdisposed directly over the lever arm with the head sheaves on theopposite side, an arrangement sometimes adopted in previousconstructions.

The bucket is operated, of course, by pulling or releasing the cable 19asis well understood by those skilled in the art, the main hinge pin 9being lowered with respect to the head during an opening movement andraised during a closing movement. 7

It will be observed that with a construction of this kind the cornerbars 5 and 6 attain their greatest spread at a oint intermediate thefully closed and the tully opened positions of the bucket, this positionoccurring approximately at the moment when the corner pins '11 and themain hinge pin 9 are in substantially'a straight line. Closing thebucket from this position involves a lowering of the head sheaves morerapidly than the. head pin which, of course, results in a greaterclosing force being exerted because more line is pulled during theclosing operation than would be the case were the sheaves on the headpin itself. This is ofdistinct advantage in the heavy work to which thistype of bucket is best adapted.

I claim I 1. A lever .arm bucket having a head pin and lever arm sheavescharacterizedby the fact that the pin and the sheaves are located onopposite sides of the vertical center line of the bucket. is

2. A lever arm bucket'havinga head pin, head sheaves and lever armsheaves characterized by the fact that the pin and the sheaves in thelever arm arelocated on 0pposite sides of the vertical center line ofthe bucket, and further by the fact that the head sheaves aresubstantially vertically above'the lever arm sheaves.

, 3. Alever arm bucket having a headpin, head sheaves and lever armsheaves'characterized by the fact that the pinand the sheaves in thelever arm arelocated on opposite sides of the vertical center line ofthe bucket, and further by the fact that the head sheaves aresubstantially vertically above the lever arm sheaves and are canted withrespect to the lever arm sheaves to correct the lead of the operatingcable. 9

4. In a bucket, the combination of hinged scoop members, a lever arm, alever arm sheave, a bucket head, a head sheave to one side of the centerline of the bucket and above the lever arm sheave, and a head pin on theopposite side of the center line.

5. In a bucket, the combination With the operatingcable of a pair ofscoops, a main hinge pin, corner bars, corner pins, a lever arm, a leverarm sheave, a bucket head, a head pin Orr-the side oi the center line ofthe bucket which'is 'opposite to thatof the lever arm sheave, said hingepin, corner pins and head piIi-bei'ngparallel, and a head sheave abovethe lever arm sheave mounted with its axis at an anglewith respect tosaid parallel pins whereby to correct the lead of the operating cable. v

In testimony whereof, 'I have hereunto signed mv name.

' I WILLIAMMAYO VENABLE.

